Case and cap for telephone-receivers.



L.- STEINBERGBR.

CASE AND GAP FOR TELEPHONE RECEIVERS.

APPLICATION FILED JAN. 13, 1913.

Patented Apr. 21, 1914.

IIWE "TOR WITNESSES fi m ATTORNEY UNITED strains PATENT onrrcu.

LOUIS STEIN-BERGER, 0F BROOKLYN, NEW YORK.

CASE AND CAI FOB TELEPHONE-RECEIVERS.

T 0 all whom it'mag concern:

Be it known that I, LOUIS STEINBERG-ER, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Cases and Caps for Telephone-Receivers, of which the following is a pecification.

This invention relates to'a telephone receiver casing, and the particular object of the invention is to provide a casing of the usual form, comprising a body part for containing the receiver meehanism, a diaphragm, and a cover for fitting over one end of the casing to retain the diaphragm in position audio form an ear piece, and' to provide reinforcing sections upon the body and upon the cover, whereby the connections between said parts may be made more substantial, and less liable to injury.

A further object is to provide a metallic ring having threads on its outer periphery and being adapted to be molded rigidly as a relatively integral part of the body of the structure, and to provide a similar metallic ring having the threads. on its inner periphery and being adapted to be molded as a relatively integral portion of the cover,

the threads of the two metallic rings referred to being of mating proportions, so that the cover may be readily attached to 'the body in the customary manner, and to form a clamp for retaining the diaphragm.

Other objects and aims of the invention, more or less specific than those referred to above, will be in part obvious and in part pointed out in the course of the following description of the elements, combinations, arrangements of parts and applications of principles, constituting the invention; and the scope of protection contemplated will be indicated in the appended claims.

in the accompanying drawings which are to be taken as a part ofthis specification, and in'which I have shown a merely preferred form of embodiment of the invention: Figure 1 is a transverse, central, sectional view through the cover of a receiver casing,-constructed in accordance, with this inventionyl ig. 2 is-a similar view of the body portion of the receiver casing, adiaphra gin being illustrated in relative position to be clamped upon the upper surface of the body; and Fig. 3"is a detail perspective View of a portion of one of the reinforcing rings employed, the particular ring here Specification of Letters Patent. I

Patented Apr, 21, 1914;.

Application filed l'anuary is, 1913. Serial to. 741,861.

illustrated being that on the body portion of the casing.

Referring to the drawings for a more de-,

tailed description of the structure, the numeral 1 indicates'the body portion of the casing generally. The body is formed or shaped in the usual manner with an aperture, as 2, at one end, for the passage of wires, and has its other end flared outwardly,

as at 3, to provide an' enlarged end portion for receiving the diaphragm illustrated at 4. Encircling the flared end portion of the body is a metallic. ring 5. 'This ring has an annular groove, as 6, formed on its inner surface adapted to receive a portion of the material of the body and providing inwardly projecting annular flanges adapted to project into relatively embedded relation with the material of the body, the lower'most of said flanges extending beneath the shoulder formed by the material of the body which projectsiinto' the groove 6. One or more transversely extending grooves, as 7, in Fig. 3, may be rovided, also for receiving a portion of tie material of the body. The annular groove 6 effectually prevents. telescoping movement of the ring trom the body, while the groove or grooves I serve to prevent a rotary movement of the ring about the body.. The outer annular surface of the ring is provided with threads 7 to be .engaged' by similar threads 8 formed on the ring 9 carried by the cover.

The cover comprises a disk portion, as 10, having a conical depression 11, and a central opening 12 of the usual or preferred formation, and having an annular pendent flange,

1.3. 'The ring 9 is fitted within the annular flange 13 and 1s provided with longitudlnal and transverse grooves on its outer surface for receiving portlons of the material of the flange 18 1n the same manner as the grooves G and 7 of the ring 5, above dei scribed. 'lhe threads 8' are formed upon the inner surface of the ring 9. In order to properly support the disk 4, the ring 6 on the body preferably projects a slight distance beyond the end surface of the body 1, as at 1%, and the disk is of a size to rest upon the projecting portion 14 ofthe, ring 6, A pendent ridge -15 is formed upon the undersurface of the disk portion 10 of the cover,

loo

and is adapted to engage the upper surface of the disk for retaining the disk in clamped relation with. the upper'surface of thermg 5, the threaded engagement of the cover with the body serving as a clamp in the usual manner.- lhe ridge 15 is of slightly less diameter than the ring 5 so as to engage the disk in a plane slightly within the ring 5,for improving the vibrating qualities of the disk.

It will be understood that though I have illustrated longitudinal and transverse o'rooves upon the rings 5 and 9 for retaining the rings in relatively fixed relation to their thereof will flow into the grooves and harden, so that the rings will become, in effect, an integral portioii of the structure and at the same time will serve to materially reinforce the same against fracture, and their presence will enable a corresponding reductionin the proportion of the parts, and a consequent saving of material. The body and cover may comprise any suitable material, but I preferably employ the material known as electrosef As many changes could be made in the above construction and many apparently widely different embodiments of this mven tion could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the aecoi'npanymg drawing shall be interpreted as illustrative and not in a limiting sense.

It is :ls o'to be understood that the language used in thet'ollowing claims is intended to cover all ofthe generic and specific features of the invention herein described and all statements of the scope of the invention, which as a matter of language, might be paid to fall thcrebetween.

Ilaving thus described my invention what I claim as new and desire to secure by Letters Patent, is:

'1. In a telephonereceiver, a body portion having an annular open end, and a reinforcing ring "tor said. end, said. ring having an annular grooms tor rerciving portions of the material of the body for preventing movement of the ring in one direction rel alirely to the body, and having a transverse groove 'for receiving portions of the material of the body to prevent movement of the ring in another direction relatively to the body.

2. In a telephone receiver, a body portion having an annular open end, and a. reintorc: ing ring for said open end, one edge of said ring forming a diaphragm seat, and the opposite edge of said ring having an inwardly projecting annular rib or flange thereon ex tending into embedded relation in the material of the body.

3. In a telephone receiver casing comprising a body portion having an annular open end, the combination therewith of a reinforcing ring fixed to the material oi said body encircling said open end and projecting thereabove to form a diaphragm seat, and the lower edge of said reinforcim;- ring being formed with an inwardly projecting annular rib or flange extending into embedded relation in the material of the body. 4-. A telephone receiver comprising a body portion having an annular open end, a reinforcing ring for said open end being formed with an inwardly projecting annular rib or flange adjacent one edge thereof extending into embedded relation in the body, and said rib or flange being provided with one or more transversely extending grooves into which the material of the body extends, for the purpose set forth.

5. In a telephone receiver structure, the combination with a casing having an annular open end, of a reinforcing ring fixed to the material of said casing for strengthening said openend and said ring projecting above the end of the casing. a cover for the open end of said casing having a separately formed reinforcing ring thereon. and having an annular depression adjacent said reinforcing ring, both of said reinforcing rings raving parts whereby they may be connected together for retaining the cover upon the casing, the projecting portion of the ring upon the casing serving as a diaphragm seat for engaging the outer annular edge portion of the receiver diaphragnn'and being disposed for forcing the outer annular edge portion of the receiver diaphragm toward the annular depression in the cover.

In testimony \vhcreot, I aliix my signature in the presence of two witnesses.

LOUIS ."rm unnuunn.

Witnesses:

Ii. (lnosronn lllmmuc, Nvruamn 'lnoMrsmi.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D, C. 

